Ported over audio-recorder 1.9.7 from its PPA, and brought up the build procedure to modern standards as far as I know how. The PPA's debian folder seems rather antiquated and clunky compared to today's Debian policy.

Figured out that build failures of Avidemux since 2.6.18 are due to it now requiring a newer libvdpau-dev--that wasn't caught by the cmake build-depend checking at the start of the build. So I updated libvdpau, and avidemux 2.6.20 build succeeded. Since ffmpeg also builds against libvdpau, that means that ffmpeg and 34 other packages that build against ffmpeg libraries also had rebuilds triggered. It should shake out within an hour.

Apparently the openSUSE user services, including the Build Service that hosts my repositories, suffered a security breach in the user authentication, and they have been shut down while they determine exactly how bad it was.